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Finding the Fourth Proportional to 487.96, 673.32 and 313.54

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Solution

The fourth proportional to 487.96, 673.32 and 313.54 is: 432.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.96 : 673.32 = 313.54 : x
  2. Step 2: Convert to fraction form
    487.96/673.32 = 313.54/x
  3. Step 3: Cross multiply
    487.96x = 673.32 × 313.54
  4. Step 4: Simplify right side
    487.96x = 211,112.75
  5. Step 5: Solve for x
    x = 211,112.75/487.96
  6. Step 6: Final answer
    x = 432.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.